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Cheap flights from Ontario to Washington from C$ 285

YYZ — SEA
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Washington

Tue 15/127:30 a.m. -
1 stop9h 10m
Mon 4/12:30 p.m. -
2 stops12h 15m
Deal found 30/10C$ 476
Tue 1/127:30 a.m. -
1 stop9h 10m
Sat 5/122:20 p.m. -
2 stops12h 25m
Deal found 25/10C$ 490
Tue 8/127:30 a.m. -
1 stop9h 10m
Sat 12/122:20 p.m. -
2 stops12h 25m
Deal found 25/10C$ 494
Tue 15/127:30 a.m. -
1 stop9h 10m
Mon 11/12:30 p.m. -
2 stops12h 15m
Deal found 30/10C$ 498
Tue 15/127:30 a.m. -
1 stop9h 10m
Sun 10/12:30 p.m. -
2 stops12h 15m
Deal found 25/10C$ 499
Wed 16/127:00 a.m. -
2 stops9h 40m
Wed 13/12:30 p.m. -
2 stops12h 15m
Deal found 29/10C$ 502
Thu 3/126:10 a.m. -
1 stop10h 30m
Mon 7/122:30 p.m. -
2 stops12h 15m
Deal found 25/10C$ 503
Tue 24/117:30 a.m. -
1 stop9h 10m
Tue 1/122:30 p.m. -
2 stops12h 15m
Deal found 27/10C$ 509
Wed 9/1212:15 p.m. -
2 stops14h 44m
Sun 13/127:17 p.m. -
2 stops12h 53m
Deal found 29/10C$ 510
Fri 27/116:10 a.m. -
1 stop10h 30m
Tue 1/122:30 p.m. -
2 stops12h 15m
Deal found 26/10C$ 510
Thu 10/126:10 a.m. -
1 stop10h 30m
Sun 13/122:30 p.m. -
2 stops12h 15m
Deal found 26/10C$ 512
Thu 26/117:30 a.m. -
1 stop9h 10m
Tue 1/122:30 p.m. -
2 stops12h 15m
Deal found 27/10C$ 513

Find flight deals from Ontario to Washington

Round-trip from

C$ 471

One-way from

C$ 285

Popular in

June

Cheapest in

February

Average price

C$ 629

Good round-trip deal

C$ 717 or less

Good one-way deal

C$ 408 or less
WestJet
  • WestJet
  • 7/1-10/1
  • 3 total stops
  • 22h 45m total
  • Ontario to Washington
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Delta
  • Delta
  • 10/12-31/12
  • 2 total stops
  • 12h 34m total
  • Ontario to Washington
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2026
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Price to beat on a round-trip flight from Ontario to Washington.
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Price to beat on a one-way flight from Ontario to Washington.
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Ontario to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSpokane

YYZ Toronto Pearson Intl - GEG Spokane

YYZGEG

Toronto Pearson Intl

Thu 10/12

2:25 p.m.-11:59 p.m.

2 stops12h 34m

Spokane

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 285

TorontoSpokane

YYZ Toronto Pearson Intl - GEG Spokane

YYZGEG

Toronto Pearson Intl

Fri 11/12

3:35 p.m.-10:15 p.m.

1 stop9h 40m

Spokane

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 285

TorontoSpokane

YYZ Toronto Pearson Intl - GEG Spokane

YYZGEG

Toronto Pearson Intl

Thu 10/12

4:10 p.m.-9:25 p.m.

1 stop8h 15m

Spokane

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 285

TorontoSpokane

YYZ Toronto Pearson Intl - GEG Spokane

YYZGEG

Toronto Pearson Intl

Fri 11/12

7:35 a.m.-6:27 p.m.

2 stops13h 52m

Spokane

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 285

TorontoSpokane

YYZ Toronto Pearson Intl - GEG Spokane

YYZGEG

Toronto Pearson Intl

Sun 13/12

10:53 a.m.-10:15 p.m.

1 stop14h 22m

Spokane

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 296

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 21/1

6:10 a.m.-1:40 p.m.

1 stop10h 30m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 302

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 21/1

4:35 p.m.-3:14 p.m.

3 stops49h 39m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 322

TorontoSpokane

YYZ Toronto Pearson Intl - GEG Spokane

YYZGEG

Toronto Pearson Intl

Mon 30/11

12:20 p.m.-9:49 p.m.

1 stop12h 29m

Spokane

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 323

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 5/12

7:50 a.m.-6:22 p.m.

2 stops13h 32m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 344

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Tue 16/2

6:10 a.m.-1:40 p.m.

1 stop10h 30m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 347

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/10

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Ontario with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Ontario to Washington

What is the cheapest month to book a flight from Region of Ontario to State of Washington?

Currently, February is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 361). Flying from Region of Ontario to State of Washington in December is currently the most expensive (average of C$ 688). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to WA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to State of Washington as you normally would.

How much does it cost to fly round-trip from Region of Ontario to State of Washington?

Airfare is typical for this route at the moment.
Region of Ontario to State of Washington flights typically cost between C$ 394 and C$ 701 in January.
The cheapest round-trip price found within the last 5 days was C$ 471 on WestJet (7 Jan-10 Jan).

How far ahead should I book a flight from Region of Ontario to State of Washington?

The price you pay for your flight from Region of Ontario to State of Washington may vary depending on when you book. For the best chance of a lower fare, look to book 72 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Washington

Check out reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Ontario to Washington to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
13,135 reviews
Check prices

Food

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Alaska Airlines
7.9
Good
13,135 reviews
Alaska Airlines
7.9
Good
13,135 reviews
Check prices

Food

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Delta
7.8
Good
8,694 reviews
Alaska Airlines
7.9
Good
13,135 reviews
Check prices

Food

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
United Airlines
7.3
Good
10,453 reviews
Alaska Airlines
7.9
Good
13,135 reviews
Check prices

Food

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
WestJet
7.2
Good
3,442 reviews
Alaska Airlines
7.9
Good
13,135 reviews
Check prices

Food

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Air Canada
7.1
Good
11,833 reviews
Alaska Airlines
7.9
Good
13,135 reviews
Check prices

Food

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.

Related info for your journey

  • How long is the flight from Region of Ontario to State of Washington?

    For as low as C$ 615, Delta can have you in State of Washington from Region of Ontario in 7h 56m. Region of Ontario and State of Washington are separated by a distance of 2947 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Ontario to Washington that include hotel bookings?

    Yes. In addition to deals on Ontario to Washington flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Washington.

  • Can I find deals for business class flights from Ontario to Washington?

    Yes. Cheapflights offers flight deals from Ontario to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Region of Ontario to State of Washington?

    Currently, February is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 361). Flying from Region of Ontario to State of Washington in December is currently the most expensive (average of C$ 688). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Ontario to Washington

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 226AverageC$ 726FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 253AverageC$ 672FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 255AverageC$ 684FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapestC$ 271AverageC$ 685FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
WestJetCheapestC$ 299AverageC$ 648FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

How does Cheapflights help users find flights from Ontario to Washington?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Washington. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Washington?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington from Ontario.

Can Cheapflights find flights from Ontario to Washington with no change fees?

Need flexible booking options for your flight to Washington from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to Washington become cheaper?

Of course! You can now track prices for flights from Ontario to Washington and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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